Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a92e9ca8d81828…

MALICIOUS

PDF

79.4 KB Created: 2021-05-05 17:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06340d7dae088402604b6bf822d7de8b SHA-1: 05fae8f71e322fb7a7aa274950801b8249ce0c91 SHA-256: 59a92e9ca8d818287b6c9e5e6395a6b94e30ad57057d19ee6923f1ceccefc783
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to unknown or potentially malicious domains, suggesting a link farm or distribution point for further payloads. The document body, though heavily obfuscated, contains metadata related to PDF generation, but the primary malicious activity appears to be the redirection to external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://bufo.online/vavatijowasigudupuronnrrq.pdf In PDF document text
    • https://cdn.sqhk.co/kabawamurelo/zWghjfs/25822937563.pdfIn PDF document text
    • http://maximizator.space/elite_mobile_car_wash_hawaiikuv3c.pdfIn PDF document text
    • https://rolorizumi.weebly.com/uploads/1/3/4/3/134316308/jusuroveb-lagetokasabe.pdfIn PDF document text
    • https://cdn.sqhk.co/kefexunas/haSNWgg/xojepujanilanukarevufak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464874/normal_605c973ebf1bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_6022c0d220601.pdfIn PDF document text
    • https://cdn.sqhk.co/boremagu/fCGhcge/75314198375.pdfIn PDF document text
    • https://judozonax.weebly.com/uploads/1/3/1/4/131454501/7426211.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/eCpD1hi/rixolegeraraxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367921/normal_603fb38a7abac.pdfIn PDF document text
    • https://sivenusa.weebly.com/uploads/1/3/1/1/131164431/4163945.pdfIn PDF document text
    • http://love-cosmetics.shop/7787254671976aqt.pdfIn PDF document text
    • https://foboxujegi.weebly.com/uploads/1/3/4/6/134694162/tuwaxinuzum.pdfIn PDF document text
    • http://wegansit.space/xuwewebafojolojozatuzvdxk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/G1IkLG9TFNM/wb?keyword=oracion%20poderosa%20al%20espiritu%20santo%20de%20diosPDF link annotation
    • https://uploads.strikinglycdn.com/files/49b22cbd-abda-4af5-8824-ab1ddbdadb5b/72253831004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64711618-4405-4258-b8f4-d010388abcc6/introduction_to_computer_science_using_python_by_charles_dierbach.pdfIn PDF document text
    • http://fojoxolizono.rf.gd/blender_3d_tutorials.pdfIn PDF document text
    • http://kewoxorewozox.rf.gd/tumulemavadig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/967c4408-a492-484e-a2a1-e512c757f7c7/29137541238.pdfIn PDF document text
    • http://nadiripu.epizy.com/the_essential_keto_cookbook_free.pdfIn PDF document text
    • http://magajavopisili.epizy.com/mureweligewerisevezozin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54d9c377-adec-411d-9b6d-21f70161b134/me_after_you_paul_kim_ost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c3bbb74-84f2-4e78-a705-a114dcfda4c2/mukilevugenexata.pdfIn PDF document text
    • http://sowinoto.epizy.com/50303947386.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CE 5092 bytes
SHA-256: 09fdc028951b497072f7bde372393dd5b05336e6cd8e8b543a573cca66a43bdd
font_01_sfnt_off00010725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10725 12288 bytes
SHA-256: a31a588123709079ae8965c987f8570f85274a5d5822d14f4d0c0bd2dc92e985